Codes
In Colorado, Carbon Monoxide Alarms must be installed within 15ft of ____________.
The outside of a bedroom door or sleeping area.
What are the 3 elements of combustion?
Air - Fuel - Heat
What 3 types of chimneys might an open-hearth fireplace have?
- Class A Chimney
- B-Vent
- Masonry
What type of power is required for an electronic ignition fire pit?
Switched power.
What does Co-Linear venting mean?
Two separate pipes, one for exhaust, one for fresh air
A gas appliance must have an accessible shut-off in the same room, within ____ feet of the appliance
Six (6)
Name two ways that Propane differs from Natural Gas.
- Propane is heavier than air, natural gas is lighter
- Propane has a lower ignition temperature than natural gas
- Propane has lower flammability limits than natural gas, so smaller amounts can combust
- Propane is stored under pressure and can be stored in portable tanks
The clearance to combustibles for a Class-A chimney pipe is typically ____.
2 inches
Which media should never be used in a fire pit?
River rocks are porous and often contain water inside tiny cracks and pores, which turns to steam when heated and can cause the rocks to explode.
What does Co-Axial venting mean?
A pipe within a pipe: exhaust is the inner, fresh air is the outer.
What standard must masonry fireplaces be built to?
NFPA 211
What are two by-products of incomplete combustion
Carbon Monoxide and Soot.
What is the 3-2-10 rule for chimney height.
3 feet above roof, 2 feet above anything within 10 feet.
What is the typical amount of ventilation space needed on opposite sides of a fire pit enclosure?
18 square inches each.
What is typically the minimum rise needed for a horizontal vent run?
1/4" rise per foot
What does ANSI Code Z21.50 cover?
Vented decorative gas appliances
_______ pressure inside the home (from exhaust fans, dryers, etc.) can pull smoke or flue gases back into the room
Negative pressure.
When would you use a snorkel termination?
When you need more clearance above grade
Can a gas fire pit be installed on a combustible deck?
It depends on the manufacturer's instructions.
In our area, a horizontal termination might have operational issues due to wind if it is on a wall facing which direction?
West
What does ANSI Code Z21.88 cover?
Vented gas fireplace heaters.
What does Pyrolysis do?
- Lowers the ignition temperature of materials
Besides being a flammable fire hazard, what else can creosote build-up do to a chimney that could affect performance?
It can reduce the inner diameter of the flue pipe, affecting draft
Which ANSI Code covers outdoor decorative gas appliances?
ANSI Z21.97
Name 2 things that cause sooting on the glass of a direct vent fireplace?
Improper air-fuel mixture, blocked venting, or misaligned logs